go.blog/constants: use a format with Printf Otherwise the prose around this snippet is confusing.
go.blog/constants: use a format with Printf
Otherwise the prose around this snippet is confusing.

LGTM=adg
R=adg
CC=golang-codereviews
https://golang.org/cl/130550043

gorakhargosh/blog,gorakhargosh/blog,jeffreyliguori/blog